maximize utility

Homework: Chapter 4 Qu Andy purchases only two goods, apples (a) and kumquats (k). He has an income of $240 and can buy apples at $2 per pound and kumquats at $12 per pound. His utility function is U(a, k) = 6a + 4k. That is, his (constant) marginal utility for apples is 6 and his marginal utility for kumquats is 4. What bundle of apples and kumquats should he purchase to maximize his utility? Apples and Kumquats